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We report the development of a continuous-wave and pulsed X-band electron spin resonance (ESR) spectrometer for the study of spins on ordered surfaces down to cryogenic temperatures. The spectrometer operates in ultra-high vacuum and…

We describe instrumentation for a high-frequency electron paramagnetic resonance (EPR) and pulsed electron-electron double resonance (PELDOR) spectroscopy. The instrumentation is operated in the frequency range of 107$-$120 GHz and…

Instrumentation and Detectors · Physics 2015-06-19 Franklin H. Cho , Viktor Stepanov , Susumu Takahashi

We report electron spin resonance spectroscopy measurements performed at millikelvin temperatures in a custom-built spectrometer comprising a superconducting micro-resonator at $7$ GHz and a Josephson parametric amplifier. Owing to the…

We describe a pulsed multi-frequency electron paramagnetic resonance spectrometer operating at several frequencies in the range of 110-336 GHz. The microwave source at all frequencies consists of a multiplier chain starting from a solid…

Quantum Physics · Physics 2008-12-01 Gavin W. Morley , Louis-Claude Brunel , Johan van Tol

We report the development of the frequency-modulation (FM) method for measuring electron spin resonance (ESR) absorption in the 210-420 GHz frequency range. We demonstrate that using a high-frequency ESR spectrometer without resonating…

Strongly Correlated Electrons · Physics 2010-07-14 Balint Nafradi , Richard Gaal , Titusz Feher , Laszlo Forro

The design and performance of an electron spin resonance spectrometer operating at 3 and 9 GHz microwave frequencies combined with a 9 T superconducting magnet is described. The probehead contains a compact two-loop, one gap resonator and…

Other Condensed Matter · Physics 2009-11-10 Ferenc Simon , Ferenc Muranyi

Electron spin resonance (ESR) is a powerful tool for characterizing and manipulating spin systems, but commercial ESR spectrometers can be expensive and designed to work in narrow frequency bands. This work presents an inexpensive…

Instrumentation and Detectors · Physics 2024-08-01 Charles A. Collett , Sofia M. Davvetas , Abdulelah Alsuhaymi , Grigore A. Timco

We present non-conventional electron spin resonance (ESR) experiments using microfabricated superconducting waveguides. We show that a very broad frequency range, from 0.5 to 40 GHz, becomes accessible with a high frequency accuracy of less…

Mesoscale and Nanoscale Physics · Physics 2014-01-13 C. Clauss , D. Bothner , D. Koelle , R. Kleiner , L. Bogani , M. Scheffler , M. Dressel

We describe a fully broadband approach for electron spin resonance (ESR) experiments where it is possible to not only tune the magnetic field but also the frequency continuously over wide ranges. Here a metallic coplanar transmission line…

In this article we discuss the design and implementation of a novel microstrip resonator which allows for the absolute control of the microwaves polarization degree for frequencies up to 30 GHz. The sensor is composed of two half-wavelength…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 J. J. Henderson , C. M. Ramsey , H. M. Quddusi , E. del Barco

We present an instrument to perform frequency-domain electron spin resonance (ESR) experiments that is based on coplanar waveguides and field modulation. A large parameter space in frequency (up to 25 GHz), magnetic field (up to 8 T), and…

Instrumentation and Detectors · Physics 2020-02-11 Björn Miksch , Martin Dressel , Marc Scheffler

A systematic electron spin resonance (ESR) investigation of the low temperature regime for the (ET)2SF5CF2SO3 system was performed in the frequency range of ~200-700 GHz, using backward wave oscillator sources, and at fields up to 25 T.…

High-Field Electron Spin Resonance measurements were made on powder samples of Cu_{1-x}Zn_{x}GeO_{3} (x=0.00, 0.01, 0.02, 0.03 and 0.05) at different frequencies (95, 110, 190, 220, 330 and 440 GHz) at low temperatures. The spectra of the…

Strongly Correlated Electrons · Physics 2015-06-25 A. K. Hassan , L. A. Pardi , G. B. Martins , G. Cao , L-C. Brunel

We present a multi-frequency Electron Spin Resonance (ESR) study in the range of 4 GHz to 420 GHz of the quasi-one-dimensional, non-dimerized, quarter-filled Mott insulators, delta-(EDT-TTF-CONMe_2)_2X (X=AsF_6, Br). In the high temperature…

Strongly Correlated Electrons · Physics 2010-07-15 Bálint Náfrádi , Areta Olariu , László Forró , Cécile Mézière , Patrick Batail , András Jánossy

In this study, we report a conceptually novel broadband high-frequency electron spin resonance (HFESR) spectroscopic technique. In contrast to the ordinary force-detected ESR technique, which detects the magnetization change due to the…

Applied Physics · Physics 2018-08-02 Hideyuki Takahashi , Tsubasa Okamoto , Kento Ishimura , Shigeo Hara , Eiji Ohmichi , Hitoshi Ohta

Electron Spin Resonance (ESR) describes a suite of techniques for characterising electronic systems, with applications in physics, materials science, chemistry, and biology. However, the requirement for large electron spin ensembles in…

Quantum Physics · Physics 2015-03-04 L. T. Hall , P. Kehayias , D. A. Simpson , A. Jarmola , A. Stacey , D. Budker , L. C. L. Hollenberg

In this work, we demonstrate the use of frequency-tunable superconducting NbTiN coplanar waveguide microresonators for multi-frequency pulsed electron spin resonance (ESR) experiments. By applying a bias current to the center pin, the…

Quantum Physics · Physics 2017-07-19 A. T. Asfaw , A. J. Sigillito , A. M. Tyryshkin , T. Schenkel , S. A. Lyon

We present pulsed electrically detected magnetic resonance (EDMR) measurements at low magnetic fields using posphorus-doped silicon with natural isotope composition as a model system. Our measurements show that pulsed EDMR experiments, well…

Materials Science · Physics 2015-06-23 L. Dreher , F. Hoehne , H. Morishita , H. Huebl , M. Stutzmann , K. M. Itoh , M. S. Brandt

We demonstrate electron spin polarization detection and electron paramagnetic resonance (EPR) spectroscopy using a direct current superconducting quantum interference device (dc-SQUID) magnetometer. Our target electron spin ensemble is…

Mesoscale and Nanoscale Physics · Physics 2024-06-24 Hiraku Toida , Yuichiro Matsuzaki , Kosuke Kakuyanagi , Xiaobo Zhu , William J. Munro , Kae Nemoto , Hiroshi Yamaguchi , Shiro Saito

A new method for detecting the magnetic resonance of electronic spins at low temperature is demonstrated. It consists in measuring the signal emitted by the spins with a superconducting qubit that acts as a single-microwave-photon detector,…

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